JPH0729015U - Pile hole drilling rod - Google Patents

Abstract

(57) [Summary] [Purpose] Pile holes are excavated by cutting the vertical flow of excavated sediment and stirring the excavated soil uniformly and efficiently. [Structure] A lower excavation blade 3 is provided at a lower end portion of a rod main body 1 and an upper excavation blade 6 is provided above a lower excavation head 7a having a diameter smaller than a predetermined pile hole diameter, and the excavation diameter is planned to be excavated. A drilling head 7 is formed by continuously connecting the drilling rings 4 having different diameters. The outer cylinder 8 is rotatably fitted at a position above the excavation head 7 of the rod body 1 and close to the excavation head 7 so as to regulate the vertical movement. The excavation head 7 is provided on the outer peripheral side of the outer cylinder 8.
The pile hole excavating rod 13 is configured by installing the ring 11 having a diameter substantially equal to that of

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pile hole excavating rod for excavating a pile hole while stirring the soil in the pile hole.

[0002]

[Prior art]

 Conventionally, in a pile hole excavating rod that excavates a pile hole while agitating the sediment in the pile hole, a rod-shaped or plate-shaped agitation means is provided on the excavation rod to agitate the excavated soil by rotating the excavation rod. .

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, each stirring means rotates uniformly according to the rotation of the excavation rod, so that there is a problem that stirring cannot be performed efficiently. Further, in order to produce the desired stirring performance, it is necessary to provide a large number of stirring means in multiple stages, which causes an excessive load on the excavating rod and makes the excavating rod difficult to handle.

[0004]

[Means for Solving the Problems]

 In this invention, however, the aforesaid problem was solved because the excavating rod was rotatably fitted with the stirring means provided with the ring having the same diameter as the diameter of the excavating head.

That is, the present invention is a drill rod having a drill head at the tip, and a ring having a diameter equal to that of the drill head is provided above the head of the drill rod and close to the drill head. The pile hole excavating rod is characterized in that the stirring means is rotatably fitted at a fixed position.

Further, in an excavating rod having an excavating head at a tip end thereof, an outer cylinder is rotatably fitted in a position close to the excavating head above the head of the excavating rod so as to be rotatable, and an outer circumference of the outer cylinder is attached. A ring having the same diameter as the diameter of the drilling head is arranged on the side, and a plurality of elongated stirring plates are radially provided at equal intervals on the outer circumference of the outer cylinder and obliquely project at a predetermined angle in a horizontal plane. The pile hole drilling rod is characterized in that the tip edge of the stirring plate is fixed to the inner surface of the ring. Further, in an excavating rod having an excavating head at its tip, an outer cylinder is rotatably fitted in a fixed position at a position above the excavating rod and close to the excavating head, and the outer peripheral side of the excavating rod is provided with A ring having the same diameter as the diameter of the drilling head was arranged, and a plurality of stirring plates were radially provided at equal intervals on the outer circumference of the outer cylinder, and the tip edge of the stirring plate was fixed to the inner surface of the ring. It is a pile hole drilling rod characterized by the following. Further, in an excavating rod having an excavating head at its tip, an outer cylinder is rotatably fitted in a fixed position at a position above the excavating rod and close to the excavating head. A ring having the same diameter as the diameter of the drilling head is placed in the outer cylinder, a plurality of stirring frames are radially arranged at equal intervals on the outer circumference of the outer cylinder, and the base end of the stirring frame is fixed to the outer cylinder. Then, the tip edge of the stirring frame is fixed to the inner surface of the ring, and stirring rods facing the excavating rod are provided in multiple stages on the stirring frame, and on the excavating rod, positions corresponding to the stirring rod are provided. It is a pile hole excavating rod characterized in that a plurality of stirring rods are radially projected at equal intervals.

Further, the excavation head has a lower excavation head having an excavation range smaller than a pile hole diameter having an excavation blade and an excavation ring having a diameter corresponding to the excavation diameter to be excavated above the lower excavation head. The excavating blade is provided on the lower surface of the outer peripheral portion of the excavating ring so as to project.

[0008]

[Action]

 Since the ring having the same diameter as the diameter of the excavating head is provided in the stirring means, the ring comes into contact with the pile hole wall, so that the rotation of the stirring means is restricted and the stirring means is not rotated, or the stirring means is not rotated. The drill rod can be rotated after the rotation of the drill rod.

[0009]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The lower end of the rod body 1 is provided with spiral blades 2, 2 having a diameter smaller than a predetermined pile hole diameter. The excavation head 7a is configured. On the outer periphery of the upper end of the spiral blade 2 of the lower excavation head 7a, an excavation ring 4 having a diameter corresponding to the excavation diameter to be excavated (almost the same as the excavation diameter) is arranged. The rod main body 1 is continuously provided on the outer periphery of the spiral blade 2 at the upper end thereof to radially project the support members 5 and 5, and the tip of the support member 5 is fixed to the inner surface of the excavation ring 4. The upper excavating blades 6, 6 are provided so as to project from the lower end portions of the support members 5, 5 to form an excavating head 7.

An outer cylinder 8 is rotatably fitted on the outer periphery of the rod main body 1 at a position above the excavation head 7 and close to the excavation head 7, and the rod main body 1 is provided on both upper and lower ends of the outer cylinder 8. The stoppers 9 and 10 for restricting the vertical movement of the outer cylinder 8 are fitted and fixed, respectively. A ring 11 having a diameter substantially the same as the diameter of the excavation head 7 is arranged on the outer peripheral side of the outer cylinder 8. Elongated (strip-shaped) agitation plates 12 are radially and equidistantly provided on the outer cylinder 11, and the tips of the agitation plates 12 are fixed to the inner surface of the ring 11. The stirring plate 12 is obliquely provided in the horizontal plane at an angle of about 45 degrees so as to rotate in the direction opposite to the normal rotation direction of the rod body 1 in response to the flow of earth and sand from below. There is.

The pile hole excavating rod 13 is configured as described above (FIGS. 1 and 2).

Next, the use of the pile hole excavating rod 13 of the present invention will be described based on the above-mentioned embodiment.

Similar to a normal excavating rod, the pile hole excavating rod 13 is normally rotated in the direction of the arrow 14 in FIG. 2B at the pile hole excavating position to excavate the pile hole 16. At this time, since the lowermost lower digging blades 3, 3 have a diameter smaller than the diameter of a normal pile hole, the resistance of the pile hole digging rod 13 at the time of initial digging can be small. The excavated soil is conveyed upward by the spiral blades 2 and 2, and is crushed by the support member. Further, since the diameter of the excavation ring 4 is substantially the same as the diameter of the excavation head 7, the outer peripheral surface of the excavation ring 4 can even out the inner wall of the pile hole.

Further, since the ring 11 has a diameter substantially equal to the diameter of the excavating head 7, the ring 11 is brought into contact with the outer periphery of the ring 11 and its rotation is restricted. The excavated earth and sand transported upward is sandwiched between the support member 5 (which is rotating together with the excavating rod 13) and the stirring plate 12 (which is restricted in rotation) and is crushed. At the same time, the stirring plate 12 receives the flow of earth and sand and resists the friction between the ring 11 and the pile hole wall, and slightly in the direction of the arrow 15 in FIG. 2 (a) (the direction opposite to the rotating direction of the rod 13). Since it rotates, the excavated soil can be stirred more.

In the above-mentioned embodiment, the stirring plate 12 is projected at about 45 degrees, but it may be projected obliquely at other angles. Further, it is also possible to project in the vertical direction without providing an angle (not shown).

Further, in the above-described embodiment, the number of the stirring plates 12 is four, but it may be two, three, or five or more.

Further, in the above-described embodiment, the excavation head 7 has the above-mentioned structure. However, if the excavation head 7 has a diameter corresponding to the excavation diameter to be excavated, a structure in which an excavation blade is projected at the lower end of the spiral blade, Other conventional structures such as a structure in which an excavating blade is provided at the lower end of the water flat rod may be used.

Further, in the above-described embodiment, the outer cylinder 8 having the excavating head 7 and the ring 11 is provided at the lower end of the excavating rod main body 1, but the auxiliary rod is detachably attached to the lower end of the excavating rod main body 1. However, the auxiliary rod may be provided with an outer cylinder 8 having a drilling head 7 and a ring 11 (not shown). It is also possible to provide the excavating head 7 on the auxiliary rod and to provide the outer cylinder 8 having the ring 11 on the lower end portion of the excavating rod body 1 (not shown).

Further, in the above-described embodiment, a conventional rod-shaped or plate-shaped stirring means may be further provided above the ring 11 of the drill rod body 1 (not shown). In this case, since the ring 11 whose rotation is regulated is located between the conventional stirring means that makes the same rotation as the excavating head and the excavating head, the vertical flow of the excavating sediment is near the ring 11. Since it breaks, more uniform stirring is possible.

[0021]

Second Embodiment Another embodiment of the present invention will be described with reference to FIG.

Horizontal rods 17, 17 are radially provided on the lower end portion of the rod body 1, and excavating blades 18, 18 are provided on the lower surface of the horizontal rod 17 so as to project downward, and rod-like projections 19, 19 are provided on the upper surface. The digging head 20 is configured by projecting upward with a predetermined interval.

An outer cylinder 21 is rotatably fitted on the rod main body 1 above the excavation head 20 and in a position close to the excavation head 20, and the rod main body 1 vertically moves the outer cylinder 21. Stoppers 22 and 23 that restrict the movement of the outer cylinder 21 in the vertical direction are fitted and fixed on both ends, respectively.

Stirring projections 24, 24 are provided on the lower surface of the stirring projections 24, 24 at positions corresponding to the rod-like projections 19 to form a stirring stick 25, and the stirring sticks 25, 25 are radiated at equal intervals to the lower end of the outer cylinder 21. Project in a shape.

Next, a ring 26 having a diameter substantially equal to the diameter of the excavating head 20 is arranged on the outer peripheral side of the central portion of the outer cylinder 21, and the outer cylinder 21 is placed above the central portion of the outer cylinder 21. A stirring plate 27 having a height up to the end is projected radially at equal intervals, and the lower end side of the tip edge 27a of the stirring plate 27 is fixed to the inner surface of the ring 26.

The pile hole excavating rod 28 is configured as described above.

Next, the use of the pile hole excavating rod 28 of the present invention will be described based on the above embodiment.

Similar to a normal excavating rod, the pile hole excavating rod 28 is normally rotated in the direction of the arrow 29 in FIG. 3B at the pile hole excavating position to excavate the pile hole 16. At this time, since the ring 26 has a diameter substantially equal to the diameter of the excavation head 20, the outer periphery of the ring 26 abuts the inner wall of the pile hole 16 and rotation is restricted. Accordingly, the excavated earth and sand is crushed and agitated by being sandwiched between the rod-shaped protrusion 19 (which is rotating together with the excavating rod 13) and the stirring protrusion 24 (the rotation of which is restricted) of the stirring rod 25. Further, as the pile hole excavating rod rotates, the excavated earth and sand in the vicinity of the stirring plate 27 collides with the stirring plate 27 whose rotation is restricted, and is crushed and stirred.

In the above-described embodiment, windows 30 and 30 (shown by a chain line in FIG. 3A) may be provided at predetermined locations on the stirring plate 27. In this case, the rotation resistance of the pile hole excavating rod 28 can be reduced, and the excavated soil passes through the window 30 or collides with the surface of the stirring plate 27, so that the stirring effect can be further enhanced.

Further, although the number of the stirring plates 27 is two in the above embodiment, it may be three or more.

Further, in the above-mentioned embodiment, the excavation head 20 has the above-mentioned structure. Other structures such as a structure in which a digging blade is provided may be used.

Further, in the above-described embodiment, the outer cylinder 21 having the drilling head 20 and the ring 26 is provided directly on the lower end portion of the drilling rod main body 1, but like the first embodiment, the drilling rod main body 1 and These can be provided on a removable auxiliary rod (not shown).

[0033]

Third Embodiment Another embodiment of the present invention will be described with reference to FIG.

Horizontal rods 17, 17 having excavating blades 18, 18 are radially provided at the lower end of the rod body 1 to form an excavating head 32.

An outer cylinder 33 is rotatably fitted on the rod body 1 above the excavation head 32 and in a position close to the excavation head 32. Stoppers 34 and 35 that restrict the movement of the outer cylinder 33 in the vertical direction are fitted and fixed to the both ends, respectively. An outer cylinder 36 is rotatably fitted on the rod body 1 above the outer cylinder 33 with a predetermined space therebetween, and the outer cylinder 36 is attached to the rod body 1 at both upper and lower ends of the outer cylinder 36. The stoppers 37 and 38 for restricting the vertical movement of are respectively fitted and fixed.

Horizontal members 40, 40 are connected to the upper and lower ends of the vertical member 39 at right angles to form a substantially U-shaped stirring frame 41. Two of the stirring frames 41 are provided on the outer peripheral side of the rod body 1. Radially arranged at equal intervals. The base ends of the stirring frames 40, 40, that is, the ends 40a, 40a of the cross members 40 are fixed to the outer circumferences of the outer cylinders 33, 36, respectively. Further, on the inner surface of the vertical member of the stirring frame 41, stirring rods 42, 42 shorter than the horizontal member 40 are juxtaposed in parallel with the horizontal member 40 in three steps at equal intervals.

Horizontal rod-shaped projections 43 are provided on the rod body 1 in four stages in the vertical direction at radial equal intervals. The rod-shaped protrusions 43 are provided corresponding to the stirring rods 42, and the rod-shaped protrusions 43 are arranged so as to be alternately arranged in the vertical direction of the stirring rods 42 with a predetermined gap.

A ring 44 having a diameter substantially equal to the diameter of the excavation head 32 is arranged at the position of the outer cylinder 33 on the outer peripheral side of the rod main body 1, and the inner surface of the ring 44 is provided with the stirring frame 41. It is fixed to the outer surface 39a of the vertical member 39 to form the pile hole excavating rod 45 (FIGS. 4A and 4B).

Next, the use of the pile hole excavating rod 45 of the present invention will be described based on the above embodiment.

Similar to the normal excavating rod, the pile hole excavating rod 45 is normally rotated in the direction of the arrow 46 in FIG. 4B at the pile hole excavating position to excavate the pile hole 16. At this time, since the ring 44 has a diameter substantially equal to the diameter of the excavation head 32, the outer periphery of the ring 44 abuts the inner wall of the pile hole 16, rotation is restricted, and rotation is delayed. Therefore, the excavated earth and sand are crushed and crushed by being sandwiched between the rod-shaped projection 43 (which is rotating together with the rod body 1) and the cross member 40 of the stirring frame 41 and the stirring rod 42 (which is restricted in rotation).

In the above-described embodiment, the stirring and agitation 42 is provided in three stages in the vertical direction and the bar-shaped projections 43 are provided in four stages in the vertical direction, but any number of stages can be provided if they are alternately provided. Further, although two stirring frames 41 are provided, three or more stirring frames 41 may be provided as long as they are provided at equal intervals. Further, the agitating frame 41 can be provided in a plurality of stages in the vertical direction, and accordingly, the rod-like projections 43 are also provided correspondingly (not shown).

Further, in the above-mentioned embodiment, the other embodiment of the excavating head 32 is the same as the second embodiment. Further, although the excavation head 32 and the outer cylinders 33, 36 are provided directly on the lower end portion of the excavation rod body 1, they are provided on the excavation rod body 1 and the detachable auxiliary rod as in the above-mentioned embodiments. It is also possible (not shown).

[0043]

Fourth Embodiment An embodiment of the present invention will be described with reference to FIG.

Horizontal rods 17, 17 having excavating blades 18, 18 are radially provided at the lower end of the rod body 1 to form an excavating head 32.

An outer cylinder 48 is rotatably fitted on the rod main body 1 above the excavation head 32, and the rod main body 1 is attached to the upper and lower end sides of the outer cylinder 48 in the vertical direction of the outer cylinder 48. The stoppers 49 and 50 for restricting the movement of are respectively fitted and fixed.

A vertical member 53 is continuously provided below the tip portion 51a of the stirring plate 51 to form a stirring frame 52, and two of the stirring frames 52 are radially arranged at equal intervals on the outer side of the rod body 1. A base end portion 51 b of the stirring plate 51 of the stirring frame 52 is provided on the outer cylinder 48 so as to project.

Further, on the inner surface of the vertical member 53 of the stirring frame 52 (on the rod body 1 side), stirring rods 54, 54 shorter than the horizontal member 52 are arranged in parallel with the stirring plate 54 in two stages at equal intervals. It is projected.

Horizontal rod-shaped projections 55 are provided on the rod body 1 in three steps in the vertical direction at radial intervals. The rod-shaped projection 55 is provided corresponding to the stirring rod 54, and is arranged so as to be positioned in the vertical gap of the stirring rod 54.

A ring 56 having a diameter substantially equal to the diameter of the drilling head 32 is arranged at the lower end of the stirring frame 52 (that is, the lower end of the vertical member 53) on the outer peripheral side of the rod body 1, and the ring 56 is provided. The inner surface of the above is fixed to the outer surface 53a of the vertical member 53 of the stirring frame 52 to form the pile hole excavating rod 57 (FIGS. 5 (a) and 5 (b)).

Next, the use of the pile hole excavating rod 57 of the present invention will be described based on the above embodiment.

Like the normal excavating rod, the pile hole excavating rod 57 is normally rotated in the direction of arrow 58 in FIG. 5B at the pile hole excavating position to excavate the pile hole 16. At this time, since the ring 56 has a diameter substantially equal to the diameter of the excavation head 32, the outer periphery of the ring 56 abuts the inner wall of the pile hole 16, rotation is restricted, and rotation is delayed. Therefore, the excavated earth and sand are crushed and stirred by being sandwiched between the rod-shaped projection 55 (which is rotating together with the rod body 1) and the stirring rod 54 (which is restricted in rotation) of the stirring frame 52. Further, as the pile hole excavating rod 57 rotates, the excavated earth and sand in the vicinity of the stirring plate 51 collides with the stirring plate 51 whose rotation is restricted and is crushed and stirred.

In the above-described embodiment, the stirring and stirring 42 is provided in three stages in the vertical direction and the bar-shaped projections 43 are provided in four stages in the vertical direction, but any number of stages can be provided if they are alternately provided. Further, although two stirring frames 41 are provided, three or more stirring frames 41 may be provided as long as they are provided at equal intervals. Further, the stirring frame 41 may be provided in a plurality of stages in the vertical direction, and accordingly, the rod-shaped projections 43 are also provided correspondingly (not shown).

Further, in the above-described embodiment, the other embodiment of the excavating head 32 is the same as the second embodiment. Further, although the excavation head 32 and the outer cylinder 48 are provided directly on the lower end portion of the excavation rod body 1, they may be provided on the excavation rod body 1 and the detachable auxiliary rod as in the above-mentioned embodiments ( (Not shown).

[0054]

[Effect of device]

 In the pile hole excavating rod of the present invention, the stirring means having the ring is rotatably provided with respect to the excavating rod, so that the stirring means does not rotate or rotates after the rotation of the excavating rod. By changing the vertical flow of the excavation, it is possible to efficiently and uniformly stir the excavated soil.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

2A is a sectional view taken along line AA of FIG.
(B) is a sectional view taken along the line BB of FIG. 1.

3 is another embodiment of the present invention, (a) is a front view,
(B) is sectional drawing in the CC line | wire of (a).

4 is another embodiment of the present invention, (a) is a front view,
(B) is sectional drawing in the DD line of (a).

FIG. 5 is another embodiment of the present invention, (a) is a front view,
(B) is sectional drawing in the EE line of (a).

[Explanation of symbols]

 1 Rod Main Body 7 Drilling Head 7a Lower Drilling Head 8 Outer Cylinder 11 Ring 12 Stirring Plate 13 Pile Hole Drilling Rod 16 Pile Hole 19 Rod-like Projection 20 Drilling Head 21 Outer Cylinder 24 Stirring Projection 25 Stirring Rod 26 Ring 27 Stirring Plate 28 Pile Hole Drilling Rod 32 Drilling head 33, 36 Outer cylinder 41 Stirring frame 42 Stirring rod 43 Rod-like protrusion 44 Ring 45 Pile hole drilling rod 48 Outer cylinder 51 Stirring plate 52 Stirring frame 54 Stirring rod 55 Rod-like protrusion 56 Ring 57 Pile hole drilling rod

Claims (5)

[Scope of utility model registration request] 1. A stirring means comprising a drilling rod having a drilling head at its tip, and a ring having a diameter equal to that of the drilling head is provided at a position above the head of the drilling rod and close to the drilling head. A pile hole excavating rod characterized by being rotatably fitted in a fixed position. 2. An excavating rod having an excavating head at a tip end thereof, wherein an outer cylinder is rotatably fitted at a fixed position above the head of the excavating rod and close to the excavating head, and an outer circumference of the outer cylinder. A ring having a diameter equivalent to that of the drilling head is arranged on the side, a plurality of elongated stirring plates are radially arranged at equal intervals on the outer circumference of the outer cylinder, and obliquely project at a predetermined angle in a horizontal plane, A pile hole drilling rod, characterized in that the tip edge of the stirring plate is fixed to the inner surface of the ring. 3. A drilling rod having a drilling head at a tip end thereof, wherein an outer cylinder is rotatably fitted in a fixed position at a position above the head of the drilling rod and close to the drilling head, and an outer circumference of the drilling rod. A ring having a diameter equivalent to the diameter of the drilling head is arranged on the side, a plurality of stirring plates are radially projected at equal intervals on the outer circumference of the outer cylinder, and the tip edge of the stirring plate is on the inner surface of the ring. A pile hole drilling rod characterized by being fixed. 4. A drilling rod having a drilling head at a tip end thereof, wherein an outer cylinder is rotatably fitted at a fixed position above the head of the drilling rod and close to the drilling head, and an outer circumference of the drilling rod. A ring having a diameter equal to the diameter of the drilling head is arranged on the side, a plurality of stirring frames are radially arranged at equal intervals on the outer circumference of the outer cylinder, and the base end of the stirring frame is fixed to the outer cylinder. Then, the tip edge of the stirring frame is fixed to the inner surface of the ring, and stirring rods directed toward the excavating rod are provided on the stirring frame in multiple stages, and on the excavating rod, positions corresponding to the stirring rod are provided. A pile hole excavating rod, characterized in that a plurality of stirring rods are radially projected at equal intervals. 5. The excavation head has a lower excavation head having an excavation range having a diameter smaller than a pile hole diameter having an excavation blade, and an excavation ring having a diameter corresponding to the excavation diameter to be excavated, which is provided above the lower excavation head. 5. The pile hole excavating rod according to claim 1, wherein an excavating blade is provided so as to project from a lower surface of an outer peripheral portion of the excavating ring.